Some months ago I bought a Klark in-line mic boost when I purchased an SE Ribbon mic. I opted for it rather than the more expensive Cloudlifter devices and it has worked really well. You can't really operate a Ribbon without a boost but recently I started using it on my dynamic mic (SM57). It makes it so much easier to get a good level vs just using the pre on my Focusrite 2i2. I have thought about upgrading to the Cloudlifter but I wonder if it would produce any better results since I'm satisfied with the Klark.